Salvin's case of mimicry among hawks.

113 Name, _Diadema anomala_, added.

117 to 122. Use of gay colours in caterpillars, with an account of
Mr. Jenner Weir's and Mr. Butler's observations.

IV.--_The Malayan Papilionidae or Swallow-tailed Butterflies, as
illustrative of the Theory of Natural Selection._

135 to 140. Additions to the discussion on the rank of the
Papilionidae, and on the principles which determine the
comparative rank of groups in the animal kingdom.

164 Illustration of variability from Mr. Baker's revision of the
British Roses.

173 Additional facts, on local variations of colour.

196 Additional genus of birds (Ceycopsis) peculiar to Celebes.

199, 200. Concluding remarks.

VI.--_The Philosophy of Birds' Nests._

218 On nesting of Terns and Gulls, rewritten.

220 to 222. Daines Barrington, and others, on the song of birds.

223 On young birds learning to build, by memory and imitation.

224 Levaillant, on mode of nest-building.

229 On imperfect adaptation in birds' nests.

VII.--_A Theory of Birds' Nests._

231, 232. Introductory passages modified, with some omissions.

233 How modifications of organization would affect the form of the
nest.

235 Illustration from the habits of children and savages.

235, 236. Objection to term "hereditary habit" answered.

237 Passage rewritten, on more or less variable characters in
relation to nidification.

248 On males choosing or rejecting females, and on the various modes
in which colour may be acquired by female birds.

249 On probable ancestral colours of female birds.

255 Protective colouring of the Waxwing.

VIII.--_Creation by Law._

293 Amount of variation in dogs.

296, 297. The "Times" on Natural Selection.

298 to 300. On intermediate or generalized forms of extinct animals
as an indication of transmutation or development.

302 Tabular demonstration of the Origin of Species by Natural
Selection.

IX.--_The development of Human Races, under the law of Natural
Selection._

316 On colour as perhaps correlated with immunity from disease in
man.

326, 327. On the probable future development of man.

330 Concluding paragraph rewritten.

_London, March, 1870._

PREFACE TO THE SECOND EDITION.

The flattering reception of my Essays by the public